Common name: Bigeye Chub
available through www.itis.gov
Identification: Robison and Buchanan (1988); Page and Burr (1991); Jenkins and Burkhead (1994). Mayden (1989) and Mayden et al. (1992) use Hybopsis, other authorities (e.g., Coburn and Cavender 1992; Gilbert 1998) have argued that this and related species should be in the genus Notropis (i.e., Notropis amblops). It is presently uncertain which of the two generic names will ultimately be accepted as valid.
Size: 9 cm.
Native Range: Lake Erie drainage, New York, Pennsylvania, Ohio, and Michigan; Ohio River basin from New York to eastern Illinois, and south to Tennessee River drainage, Georgia and Alabama; Ozarks of southern Missouri, northern Arkansas, and northeastern Oklahoma (absent in Missouri River drainage) (Page and Burr 1991).
A single specimen was taken from Mopus Brook, a tributary of the lower Hudson River, Fairfield County, Connecticut, in 1987 (Whitworth 1996).
Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Hybopsis amblops are found here.
Table last updated 2/27/2023
† Populations may not be currently present.
Means of Introduction: Fish was probably introduced as a result of a bait bucket release.
Status: Reported in Connecticut; more recent sampling in state has failed to produce any additional specimens (Whitworth 1996).
Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.
Revision Date: 4/30/2018
Peer Review Date: 3/19/2013
Nico, L., 2023, Hybopsis amblops (Rafinesque, 1820): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=547, Revision Date: 4/30/2018, Peer Review Date: 3/19/2013, Access Date: 3/27/2023
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.